Why Ground Screws? Ground Screws vs Concrete

A Better Way to Build

The Case Against Concrete for Garden Rooms

Concrete has been used for foundations for decades. But for garden room projects specifically, it creates more problems than it solves — and there's a better option available.

Concrete requires excavation, mixing, pouring and then a curing period before anything can be built on top. It's messy, slow, and leaves a permanent mark on the garden even before a single wall panel goes up. On soft or clay-heavy ground, poured concrete can crack or shift over time.

Ground screws were designed specifically to address every one of these problems. They're faster, cleaner, more accurate and more practical — especially for the lightweight structures garden rooms represent.

Ground screws installed on a challenging clay hillside site in South East England, demonstrating versatility across all ground conditions

The Advantages

Why Ground Screws Win Every Time

Same-Day Installation

Ground screws are installed in hours. No pouring, no mixing, no waiting. The foundation is complete and load-bearing the same day our team arrives — keeping your whole project on schedule.

No Concrete Curing Time

Concrete needs 24–48 hours minimum before it can be built on. Ground screws are ready immediately. For garden room companies and contractors, this saves a wasted day on every single project.

No Excavation or Spoil

Ground screws are driven straight into the ground. There's no digging out, no turf to remove and no spoil to dispose of. The garden stays in the same condition it was before we arrived.

Precise Levels Every Time

Our installation machinery allows us to set each screw to exact levels with a precision that's difficult to achieve manually with poured concrete. The result is a level, square foundation every time.

Works in All Typical Ground Conditions

Our screws provide reliable bearing across clay, loam and sandy soils — the full range of ground conditions you'll encounter in South East England. For most garden room foundations the 1.25m is the right choice; we also carry 1m, 1.5m and 2m for sites that need them.

Adjustable & Removable

Unlike concrete, ground screws can be height-adjusted and, if needed, removed completely. If your plans change or the structure ever needs to be repositioned, you're not stuck with a permanent concrete slab.

Lower Environmental Impact

Concrete production is one of the most carbon-intensive building processes. Ground screws produce a fraction of the CO₂ of a comparable concrete foundation — a meaningful difference when multiplied across hundreds of projects.

Less Labour-Intensive

Concrete foundations require significant manual effort: digging, mixing, pouring and finishing. Ground screw installation is carried out by our specialist machinery with minimal manual labour — faster and more consistent as a result.

Proven Long-Term Performance

Ground screws are a well-established foundation system used commercially and residentially worldwide. When correctly installed, they provide decades of reliable, stable performance — often outlasting the structures built on top of them.

The Full Picture

Ground Screws vs Concrete — Side by Side

Factor

Install time

Cure / wait time before building

Excavation required

Spoil to remove

Garden disruption

Precision of levelling

Works in clay soil

Works in sandy soil

Adjustable once installed

Removable / reversible

Carbon footprint

Typical disruption to garden

Ground Screws (Ground Down)

Same day

None — build immediately

None

Minimal

High precision

Yes

Much lower

Minimal

Concrete Foundations

Multi-day process

24–48+ hours minimum

Yes — significant

Yes — needs disposing

Significant

Variable

Can crack / shift

Can wash away

Permanent

High CO₂

Significant

Specifically for Garden Rooms

Why Ground Screws Are Especially Suited to Garden Room Foundations

Garden rooms are lighter than commercial structures, they sit on residential ground, and they're built in occupied gardens where disruption needs to be minimal. Ground screws are almost perfectly matched to this set of requirements.

Right-sized for the load

Garden rooms are relatively lightweight. Ground screws provide the correct bearing capacity without over-engineering the foundation — keeping costs sensible.

Installed in occupied gardens without disruption

No excavators, no skips, no concrete lorries. We turn up, install and leave — and the garden looks the same as before we arrived.

Keeps garden room builds on schedule

For garden room companies and contractors, the immediate build-readiness of ground screws means no wasted days waiting for concrete — and projects stay on time.

Works on the ground conditions found in South East England

We've installed ground screws across hundreds of South East England garden sites. They perform consistently across the clay, loam and sandy soils typical of the region.

We've Installed Hundreds of Garden Room Foundations

The evidence for ground screws being the right choice for garden rooms isn't theoretical — it comes from 500+ completed installations across Surrey, Kent, Sussex and the wider South East.

Why Ground Screws Are the Right Choice for Garden Rooms